# DesignTools 2D Design file — file signature 07 64 74 32 64 64 74 64 at offset 0

For DesignTools 2D Design file, hex signature is 07 64 74 32 64 64 74 64; offset is 0; extension is dtd, verified against its source on 2026-09-22.

- **Hex signature:** 07 64 74 32 64 64 74 64 _(verified: appears in the quote below)_
- **Offset:** 0 _(verified: appears in the quote below)_
- **Extension:** dtd _(verified: appears in the quote below)_
- **Format:** DesignTools 2D Design file _(verified: appears in the quote below)_

## What the source says

> 07 64 74 32 64 64 74 64 | ␇dt2ddtd | 0 | dtd | DesignTools 2D Design file |

## Source

- https://en.wikipedia.org/wiki/List_of_file_signatures

Last verified: 2026-09-22. Review by: 2027-09-22.
Part of [File format magic numbers](https://referencesource.org/file-format-signatures/).